To accurately represent the channel state in urban environments, we adopt the PLC model[1]}, for which the ground-UAV channel can be represented by LoS or NLoS state. Thus, for GN \(k\) , the LoS probability in the \(n\) th time slot is given by
\(P_{k}^{\mathrm {L}}[n]=\frac{1}{1+a e^{\left(-b\left[\psi _{k}[n]-a\right]\right)}},\) 
